Of qiiarbmjont



Dec. 22,

W. S. HOFSTRA FUEL OIL BURNER- Filed March 17, 1 921 Patented Dec. 22,1925.

ommmr C MPANY, a CORPORATION, or" lvxlassnonnsn r'rs:

- H ELE BURNER;

Application meanarcn 17, 1921. Serial No. 458,177.

To all wh'mmz't' concerto."

Be: it: known. that; I, WIEBEJ S. HOFSTRA, a. citizen o-fxthe UnitedStates, residing at Claremont, in theconntybf' Sullivan and StaterofNew: -Hampshire, #have invented certain new anduseful Improvements: inFuehOil Bnrirers, of which the 'fol lovving is. ai-full,clear;and:exactaspecifioation.

My invention relatesrto fuel oil burners and; more aespecial-l-y: to;fuell oil; burners of the;..type employing. air or-steain for theatomization oftheioiL; I An object-of my: invention; is. to provide an;improved-duel oil burner; Another ob, je'ct zoi my irwention is to,provide animproved airrorsteam-atomizing fuelaoil' burner: 'Axfurtherobject offl my -invention.:is to proyyideantimproved fuel oil burner ofthe air 'orwsteam atomizen type Y in which the parts: Willautomatically:maintainttheir ad's Jiflfitnzcent: v in whichflthe.necessity for matching threads andsimilarly (llfllClilllt mechanical?processes may be a-voidech: 1

. Inthev accompanying drawings, I-have sho ivn 1 for purposes; ofillustration, one v form which my-iinventionimay assume; in practice.In-Qthese drawings,,-.-. I 1

.Eig. l is. a; centralTlong-itud-inal: section through an .oi t burner.showing the. illustra; tive'fiormot mvinvention;

Fig. 2 is a transverse 'section taken on the line 2.-2i ofll ig .v l-'For purposes of illustration I have shown an oil burner generallyindicated by 1 mounted in a plate 2 which may be a portion of theregister of an 011 burnlng outfit.

This oil burner comprises concentrically disposed oil and atomizingfluid chambers 3 and 4, the oil chamber being disposed to the inside ofthe atomizing' fluid chamber. Oil issupplied to the chamber 8 by way ofa passage or pipe 5 and is discharged under pressure through an orifice6 at the front end of the member 3 under the control of a needle valve 7Whose position is regulated by a hand wheel'S. The atomizing fluid,herein air, is supplied by Way of a passage 9 to the chamber 4 and isdischarged in a whirling cone through an orifice 1O coaxial with theorifice 6. For the purpose of imparting a conical form to the jet of airpassing through the chamber 4, I provide a number of vanes 11 contactingwith the forward end of the chamber 4 and spirally arranged in order toimpart the necessary motion .to=:the air. In my improved construction I:form: thesev vanes upon a; sliding sleeve 12- which is, closed at itstron-t end as-indicated at; 13 and which forms the frontclosure for theoil chamber The sleeve 1'2'h-as a ground fit Wi-tlf'tllf front end ofthe chamber- 3 and the spring I4, extend ing :bet\veen .t11e sleeve 12and a shoulder- 15 serves'tomaintain the vanes 11 atall 'times in;contacts with: v the forward interior periphery/of the chamber By ireason" of I this 3 construction, it will be apparent thatall the airpassing-through the orifice 10 will be i guided" by the vanes 11andrnonewwill pass: out without receiving the-:clesired naction.. Itwill also: be evident that the spring automatically maintains the vanesin proper position to influence all of the air passingthrough the burnerand that it is unnecessaryto employ a systemof matchedxthread's in orderthat: the vanes' may be properlywdisposed. "Theground surface betweenthe sleeve-=12: and the inner Wall of the'chamber r will -sufliceltoprevent leakage, thespring v is sufficiently protected from the .heat:by its (distance from th'eof" the passage andxb-y the oil by wl'iichitis sun. I

tion may be modified and embodied in.

yarious other forms without departing from lts spirlt or the scope ofthe appended claims.

What I claim as new and desire to secure by Letters Patent is:-

1. In an oil burner, means forming concentrlc oil and atomizmg fluidpassages, a

said passages and having a restricted oil discharge port formed therein,and means for variably controlling the flow of oil through said port. 7

2. In an oil burner, means forming concentric oil and atomizing fluidpassages, a resiliently positioned member provided 'With spiral vanesdisposed in said passages and having a restricted oil discharge portformed therein, and means for variably controlling the flow of oilthrough said port.

3. In an oil burner, means forming an atomizing fluid passage providedwith a conical resiliently positioned member disposed in 7 havingorifices formed therein at the for ward end thereof of less diameterthan said passages, a needlevalve controlling the flow through theorifice communicating with the fuel oil passage, and a vane carrying member resiliently disposed-in contiguity'with the orifice of saidatomizing fluid passageway, said last mentioned member comprisingthefuel oil orifice and also comprising a seatforsaid needle'valve. 1 a

5; In an oil burner, means forming'a passageway for atomizing fluid,means forming a passageway for-fuel oil, both of said means havingorifices formed therein at. the forward end thereof of less diameterthan said passageways, a needle valve controlling the flow through theorifice communicating with the fuel oil passage, a vane carrying memberdisposed in contiguity'with the orifices of said atomizing fluidpassageway, said member also comprising a seat" forsaid needle .valv'e,and resilient -means for maintaining said member in co-ntiguity to theorifice in said atomizing fluid passage means.

6. In an oil burner, means forming concentric oil and atomizing fluidpassages, a

resiliently positioned member disposed in said passages, said memberhaving a restrictedoil discharge orifice formed therein,

and valve means cooperating withsaid orifice for controlling the flow ofoil therethrough.

7. In an oil burner, means forming concentric oil and atomizing fluidpassages, a resiliently positioned member disposed in said passages,said member being provided with spiral vanes and having a restricted oildischarge orifice formed therein, and valve means cooperating with saidorifice for controlling the flow of oil therethrough.

8. In an oil burner, means forming inner and outer oil and atomizingfluid passages, and a member resiliently positioned in said passages andhaving a reducedsleeve portion slidably mounted in said inner passage,said member being adaptedto impart a whirling motion to the atomizingfluid discharging from said outer' passage.

9. In an oil burner, means forming inner and outer oil and atomizingfluid passages, said inner passage formlng means having a bore formedtherem, and a member resiliently positioned in'said passages and havinga reduced sleeve portion slidably mounted in said bore, said memberbeing adapted to'im part a u'rhirling motion to the atomizing fiu1ddlscharging from said outer-passage. V

10. In an oil burner, means forming inner and outer oil and atomizingfluid passages,

WIEBE s. HOFSTRA.

